HOW TO INSTALL: WINDOWS C:\users\you\appdata\roaming\rain OSX: ~/Library/Application Support/Rain/ do backup of the wallet, copy bootstrap.dat to rain folder, restart rain client - it may take a while
#ABOUT THAT CRASHING "PROBLEM"# Don't touch rain wallet when's updating, let it work, if you will try to use it right after download, it may crash as it's updating files constantly.